I don't really know what it is. I don't know if the parents just didn't teach them anything or if the kids are in that phase when they decide they can just ignore everyone. So many kids now seem to hit that age when they aren't kids and they aren't adults. They want to be considered adults but still want the ability to be the kid and do whatever without responsibilities.
I constantly see this at my job. These 12-15 year olds come to play mini golf and decide that because they paid for the round they can do whatever. They will climb the rock, stand in the waterfall, walk on loose logs that lay over the course, smack the clubs into the ground, and plenty of other things.
My family is currently dealing with, what I believe is, one of these "adult" kids. He living in my uncles rental property (2-3 bedroom house) for an amazing price, and the only rules he was told is not to let some previous tenants back in and to keep the lawn mowed, sidewalk shoveled, and backyard clean. I don't know if he just forgets to mow the lawn or if he thinks he shouldn't have to, but the last time my uncle checked, he said it looked like it hadn't been cut for 4-6 weeks. There were cords sitting out the grass and gardening tools as well. And, to top it off, this is about the 4th time he complained about this tenant doing this. The past 3 times the insurance company called to tell my uncle they would revoke his insurance on the property if it didn't get cleaned up so the whole family went to help get it clean. I'm not sure if the tenant is hoping that will happen again, but I already told my uncle if I'm helping again that I'm charging the tenant for it.
I wonder if some of it is that there's no more sense of pride in things. Everyone has a smartphone it seems and it seems like the kids get it without working for it. When I got mine, it was because my phone of 4 years was barely working any more and I got the cheapest thing out there. We even got it with a deal so it was essentially free. And yet I see these kids walking around with the newest iPhone when they are 13. If they earned it/paid for it themselves, then fine, but I don't get these parents who seem to just buy their kids whatever they want. I was at a Christmas party last year and this little boy, maybe 6-8, was telling me about how he just got a Wii U, a 3DS, 2 games for each console, and a new laptop and that's just what his parents bought him. I mean, WTH. Why does he need all that?